[Piglit] [WIP 4/4] tests/spec: ARB_transform_feedback3 interleaved in multiple streams
Topi Pohjolainen
topi.pohjolainen at intel.com
Mon Sep 16 07:54:45 PDT 2013
Signed-off-by: Topi Pohjolainen <topi.pohjolainen at intel.com>
---
tests/all.tests | 1 +
.../spec/arb_transform_feedback3/CMakeLists.gl.txt | 1 +
.../ext_interleaved_single_gs_many_streams.c | 290 +++++++++++++++++++++
3 files changed, 292 insertions(+)
create mode 100644 tests/spec/arb_transform_feedback3/ext_interleaved_single_gs_many_streams.c
diff --git a/tests/all.tests b/tests/all.tests
index c1ee32e..68a15d7 100644
--- a/tests/all.tests
+++ b/tests/all.tests
@@ -2260,6 +2260,7 @@ arb_transform_feedback3['arb_transform_feedback3-ext_interleaved_two_bufs_vs'] =
arb_transform_feedback3['arb_transform_feedback3-ext_interleaved_two_bufs_gs'] = PlainExecTest(['arb_transform_feedback3-ext_interleaved_two_bufs', '-auto', 'gs'])
arb_transform_feedback3['arb_transform_feedback3-ext_interleaved_single_stream_many_buffers_vs'] = PlainExecTest(['arb_transform_feedback3-ext_interleaved_single_stream_many_buffers', '-auto', 'vs'])
arb_transform_feedback3['arb_transform_feedback3-ext_interleaved_single_stream_many_buffers_gs'] = PlainExecTest(['arb_transform_feedback3-ext_interleaved_single_stream_many_buffers', '-auto', 'gs'])
+arb_transform_feedback3['arb_transform_feedback3-ext_interleaved_single_gs_many_streams'] = PlainExecTest(['arb_transform_feedback3-ext_interleaved_single_gs_many_streams', '-auto'])
arb_uniform_buffer_object = Group()
spec['ARB_uniform_buffer_object'] = arb_uniform_buffer_object
diff --git a/tests/spec/arb_transform_feedback3/CMakeLists.gl.txt b/tests/spec/arb_transform_feedback3/CMakeLists.gl.txt
index e962325..cbcc65a 100644
--- a/tests/spec/arb_transform_feedback3/CMakeLists.gl.txt
+++ b/tests/spec/arb_transform_feedback3/CMakeLists.gl.txt
@@ -10,5 +10,6 @@ link_libraries (
piglit_add_executable (arb_transform_feedback3-ext_interleaved_two_bufs ext_interleaved_two_bufs.c)
piglit_add_executable (arb_transform_feedback3-ext_interleaved_single_stream_many_buffers ext_interleaved_single_stream_many_buffers.c)
+piglit_add_executable (arb_transform_feedback3-ext_interleaved_single_gs_many_streams ext_interleaved_single_gs_many_streams.c)
# vim: ft=cmake:
diff --git a/tests/spec/arb_transform_feedback3/ext_interleaved_single_gs_many_streams.c b/tests/spec/arb_transform_feedback3/ext_interleaved_single_gs_many_streams.c
new file mode 100644
index 0000000..bae0dc5
--- /dev/null
+++ b/tests/spec/arb_transform_feedback3/ext_interleaved_single_gs_many_streams.c
@@ -0,0 +1,290 @@
+/*
+ * Copyright © 2013 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#include "piglit-util-gl-common.h"
+#include "xfb3_common.h"
+
+/**
+ * @file ext_interleaved_single_gs_many_streams.c
+ *
+ * Record varyings using multiple vertex streams originating from the same
+ * geometry shader instance. The test uses the maximum amount of streams
+ * supported by the implementation. Each stream records an interleaved set of
+ * two attributes into its own transform feedback buffer - the spec does not
+ * allow one to record multiple streams into one single buffer:
+ *
+ * "All varyings assigned to a given binding point are required to come from a
+ * single vertex stream."
+ *
+ * This test uses the "EXT"-style GLSL transform feedback.
+ */
+
+PIGLIT_GL_TEST_CONFIG_BEGIN
+
+ config.supports_gl_compat_version = 10;
+
+PIGLIT_GL_TEST_CONFIG_END
+
+static char *
+generate_geometry_shader(unsigned n_streams)
+{
+ unsigned i;
+ char *res;
+ char *curr;
+ static const char prologue[] =
+ "#version 150\n"
+ "#extension GL_ARB_gpu_shader5 : enable\n"
+ "layout(points) in;\n"
+ "layout(points, max_vertices = %u) out;\n";
+ static const char output_per_stream[] =
+ "layout(points, stream = %u) out;\n"
+ "out float x1_for_stream_%u_out;\n"
+ "out vec2 x2_for_stream_%u_out;\n";
+ static const char main_opening[] = "void main() {\n";
+ static const char vertex_emission_per_stream[] =
+ " gl_Position = gl_in[0].gl_Position;\n"
+ " x1_for_stream_%u_out = %u.0 + 1.0;\n"
+ " x2_for_stream_%u_out = vec2(%u.0 + 2.0, %u.0 + 3.0);\n"
+ " EmitStreamVertex(%u);\n";
+ static const char main_closing[] = "}\n";
+ const unsigned int_extra = formatted_int_extra_space(2 * n_streams);
+
+ curr = res = malloc(sizeof(prologue) + int_extra +
+ sizeof(main_opening) +
+ n_streams * (sizeof(vertex_emission_per_stream) +
+ 5 * int_extra +
+ sizeof(output_per_stream) +
+ 3 * int_extra) +
+ sizeof(main_closing));
+
+ curr += sprintf(curr, prologue, n_streams);
+
+ for (i = 0; i < n_streams; ++i)
+ curr += sprintf(curr, output_per_stream, i, i, i);
+
+ curr += sprintf(curr, main_opening);
+
+ /**
+ * Generate vertex emission for each stream explicitly. The argument
+ * for 'EmitStreamVertex()' cannot be simply a loop variable. The spec
+ * for GL_ARB_gpu_shader5 says:
+ *
+ * "The argument <stream> must be a constant integral expression."
+ */
+ for (i = 0; i < n_streams; ++i)
+ curr += sprintf(curr, vertex_emission_per_stream,
+ i, i, i, i, i, i);
+
+ curr += sprintf(curr, main_closing);
+
+ return res;
+}
+
+static void
+setup_varyings(GLuint prog, unsigned n_streams)
+{
+ /**
+ * The spec for ARB_transform_feedback3 says:
+ *
+ * If a string in <varyings> is "gl_NextBuffer", it does not identify a
+ * varying variable, but instead serves as a buffer separator value to
+ * direct subsequent varyings at the next transform feedback binding
+ * point.
+ */
+ static const char separator[] = "gl_NextBuffer";
+ static const char x1_template[] = "x1_for_stream_%u_out";
+ static const char x2_template[] = "x2_for_stream_%u_out";
+ const unsigned int_extra = formatted_int_extra_space(2 * n_streams);
+ /* Varyings for 'n' streams are separated by 'n - 1' separators.*/
+ const unsigned var_n = 2 * n_streams + n_streams - 1;
+ char *var_strings;
+ char *curr;
+ const char **var_array;
+ const char **curr_var;
+ unsigned i;
+
+ curr = var_strings = (char *)malloc(n_streams *
+ (sizeof(x1_template) + int_extra +
+ sizeof(x2_template) + int_extra) +
+ (n_streams - 1) * sizeof(separator));
+ curr_var = var_array = (const char**)malloc(var_n *
+ sizeof(const char *));
+
+ for (i = 0; i < n_streams; ++i) {
+ if (i != 0) {
+ *curr_var++ = curr;
+ curr += sprintf(curr, separator);
+ ++curr; /* terminator */
+ }
+
+ *curr_var++ = curr;
+ curr += sprintf(curr, x1_template, i);
+ ++curr; /* terminator */
+
+ *curr_var++ = curr;
+ curr += sprintf(curr, x2_template, i);
+ ++curr; /* terminator */
+ }
+
+ /**
+ * It should be noticed that when mixed mode is used, i.e., where
+ * one records multiple attributes per buffer but also uses separate
+ * buffers, the mode must be set to interleaved.
+ */
+ glTransformFeedbackVaryings(prog, var_n, var_array,
+ GL_INTERLEAVED_ATTRIBS_EXT);
+
+ free(var_array);
+ free(var_strings);
+}
+
+/* TODO: use piglit utilities */
+static void
+build_and_use_program(unsigned max_streams)
+{
+ GLuint vs, gs, prog;
+ char *gs_text = generate_geometry_shader(max_streams);
+
+ prog = glCreateProgram();
+ vs = piglit_compile_shader_text(GL_VERTEX_SHADER, vs_pass_thru_text);
+ glAttachShader(prog, vs);
+
+ gs = piglit_compile_shader_text(GL_GEOMETRY_SHADER, gs_text);
+ glAttachShader(prog, gs);
+
+ free(gs_text);
+
+ /**
+ * In the EXT-style the recorded varyings need to be set before
+ * linking.
+ */
+ setup_varyings(prog, max_streams);
+
+ if (!piglit_check_gl_error(GL_NO_ERROR))
+ piglit_report_result(PIGLIT_FAIL);
+
+ glLinkProgram(prog);
+ if (!piglit_link_check_status(prog))
+ piglit_report_result(PIGLIT_FAIL);
+ if (!piglit_check_gl_error(GL_NO_ERROR))
+ piglit_report_result(PIGLIT_FAIL);
+
+ glUseProgram(prog);
+}
+
+void
+piglit_init(int argc, char **argv)
+{
+ int i;
+ int pass = 1;
+ GLuint *xfb;
+ GLint max_streams, max_comps;
+ float expected[1 + 2];
+
+ piglit_require_GLSL_version(150);
+ piglit_require_extension("GL_ARB_geometry_shader4");
+ piglit_require_extension("GL_ARB_transform_feedback3");
+ piglit_require_extension("GL_ARB_gpu_shader5");
+
+ glGetIntegerv(GL_MAX_VERTEX_STREAMS, &max_streams);
+ if (!max_streams) {
+ printf("Number of vertex streams supported is zero\n");
+ piglit_report_result(PIGLIT_FAIL);
+ }
+
+ glGetIntegerv(GL_MAX_TRANSFORM_FEEDBACK_INTERLEAVED_COMPONENTS,
+ &max_comps);
+ if (!max_comps) {
+ printf("Number of interleaved components is zero\n");
+ piglit_report_result(PIGLIT_FAIL);
+ }
+
+ /* Get the number of varyings - each consumes four components */
+ max_comps /= 4;
+
+ if (2 * max_streams > max_comps) {
+ printf("Test uses two attributes/stream - only %u(%u streams) "
+ "attributes supported by the stack\n",
+ max_comps, max_streams);
+ piglit_report_result(PIGLIT_FAIL);
+ }
+
+ build_and_use_program(max_streams);
+
+ xfb = malloc(max_streams * sizeof(GLuint));
+
+ /* Set up the transform feedback buffers. */
+ glGenBuffers(max_streams, xfb);
+ for (i = 0; i < max_streams; ++i) {
+ glBindBufferBase(GL_TRANSFORM_FEEDBACK_BUFFER_EXT, i, xfb[i]);
+ glBufferData(GL_TRANSFORM_FEEDBACK_BUFFER_EXT, sizeof(expected),
+ NULL, GL_STREAM_READ);
+ }
+
+ /* Use GL_RASTERIZER_DISCARD, since we are going to use
+ * transform feedback for this test.
+ */
+ glEnable(GL_RASTERIZER_DISCARD);
+
+ if (!piglit_check_gl_error(GL_NO_ERROR)) {
+ free(xfb);
+ piglit_report_result(PIGLIT_FAIL);
+ }
+
+ /* Draw and record */
+ glBeginTransformFeedback(GL_POINTS);
+ glDrawArrays(GL_POINTS, 0, 1);
+ glEndTransformFeedback();
+
+ if (!piglit_check_gl_error(GL_NO_ERROR)) {
+ free(xfb);
+ piglit_report_result(PIGLIT_FAIL);
+ }
+
+ /* Check the recordings against expectations */
+ for (i = 0; i < max_streams; ++i) {
+ char label[32];
+
+ sprintf(label, "stream[%u]", i);
+
+ expected[0] = i + 1; /* x1[0] */
+ expected[1] = i + 2; /* x2[0] */
+ expected[2] = i + 3; /* x2[1] */
+
+ pass = piglit_probe_buffer(xfb[i],
+ GL_TRANSFORM_FEEDBACK_BUFFER_EXT, label, 1,
+ ARRAY_SIZE(expected), expected) &&
+ pass;
+ }
+
+ free(xfb);
+
+ piglit_report_result(pass ? PIGLIT_PASS : PIGLIT_FAIL);
+}
+
+enum piglit_result
+piglit_display(void)
+{
+ /* Should never be reached */
+ return PIGLIT_FAIL;
+}
--
1.8.3.1
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